Elevator safety system.



H. G. HILLMANi ELEVATOR SAFETY SYSTEM. APPLILATION FILED JULY l3. I912 1,244,21 1. Pzitented Oct; 23,1917.

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i Wzw Fig. 1, and including a switch on the car i trolling the safety circuit in t e same'than UNITED FFI E-1 assay a mamas," OF NEW Ironic;

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' Bea itnknown thatl, Hnnryi Hunt/nan, a, citizenoifi the United States, residing, i at, New Yorkgiin the county of NewiYork and:

' State of New Yorkahave invented new and useful Improvements in Elevator Safety. Systems, of which the following is a specification. 4

My invention relates to safety systems for elevators in which there is an interrelation. between the door or doors controlling entrance to or egress from the elevator car, and the elevator control or operating mechanism, and the invention has for its principal object: the provision of means wherebythe car oporator may at all times beinformed as to the condition and operation of the safety de vices." Y

further object is to providemeanswhereby'thecaro-per'ator may 'kno'w at once when the safety'conditiondoe's not existv A further object is tocoinbi e"'wit=h-:th e# safety-apparatus 'antl a; suitab "source of current,:- and located in the car,ia lamp which will; be lightec t when the unsafe: condition exists and will be darlrwhen the safety con dition exists, or-vice versa; The unsafe con dition maybe considered anopen or un-' locked car or floor door, and the safetycondition may be considered the closed or locked doors icy-which egress from or-admission to the elevator car is controlled.

The invention consists in the novel com binat'iofiand arrangement of apparatus and: cifr'cui-ts' hereinafterfidescri-bed, and shown the accompanyingdrawings, in which drew- %igure 1 is a diagrammatic representation (if; an F electrically controlled or V operated elevator equipped with asarety system to which my invention is applied;

Fi @slrbvv the lockln'g' device of a hydrau ic elevator equipped with invention WTZJHJ l id 1 Fig. 3 shows a detail' ofthecar shbwn in operates by the" collapsible "are" "an:

ner as the switches operated by the floor doors.

Referring to the drawings, A is an elevator car controlled or operated through circuit 1, 1, by any suitable-or well-known apparatus, such as hand switch 0.

Circuit 1, 1, is controlled by an electrosb lfifii n LtffiirPafiit [Patented Oct; 23', 1917.

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magnetic device B with which is combined means for controlling the circuit of the flash light or lamp, to be presently described, lo cated i n'the elevator car. Electroinagnet B, has a movable core Z) to which is secured bridging contactb which is preferably a copper disk and mounted so as to have a slight rocking play. To effect this, the lower end of core Z) is slightly rounded, and the disk secured by pin 6 having the inner surface ofits head also rounded, as shown.

-Bridging contact 6 is adapted to engage and make electrical connection between carbon contacts 6 which form the terminals of control or power circuit 1, 1.

At its upper end electroniagnet B is pro vided with a fixed core Z) having a central bore through which extends rod 0 of switch CL Switch C constitutes a circuit closer for the.-,.. tlaslrl.ightD in the elevator car from which conductors 2, 2 extend to plates: 0 Mounted upon each of plates 0 is a spring" pressed carbon contact "0 which contacts constitute the circuit terminals and 00 operate with copper disk bridging contact c -mounted upon rod 0 in any suitable manner. V

E, F and Gr are elevator floor doors, F being shown open and the others closed.

Eleetromagnet B isadapted to be ener gized from source of current through cir cuit 3, 3, which circuit is closed through one ormoreof switches I, J, K when the respectivefloor doors or any of them are open orunlocked. i

Current for circuit 2', 2,:may be 'derived from any suitablesource, as fromthel ighh i-ng circuit 4,4, the car light receivin 1 cur-- rent through one: of conductors 2, con ueto'r Wan-d conductor 5. I 1 we The operation of the system is as; followsc When the doors are all closed or: locked, cir cuit 3' or electroma net-Bis apex-rand also: down so that brid'ging contact rests oir terminals b of control or power circuit lii When a door, for instance F, is open, the

apparatus win -be as sn'cwirin nigz 1'.-

one his closed at door switch J, thereby energizing electromagnet B which pulls up its core and performs its double function, as follows. Elevator control or power circuit 1 is opened. Flash light circuit 2 is closed at contacts 0 by bridging contact 0 thereby lighting lamp D on the car. When the door is again closed the parts resume their rev origmataenoa t'fifiamiiiig ill this be. se n, t e i d cat on, ill

i e i'bi" as well'to its being unlocked, the two locked, and this independent of the control of the application of power to tl e car h ythe of the car and irrespective oif thetposition 0ft?" the normal car operating means or con- SwitchesI, Jfand "y Be'ofaany pre ferred construction: As s"hown;; *each conri p'ris'e's'a; spring-pressed element 7" which in its forward positioir cornpletes'the electrical circuit through; springs 17' and in its rearward position interrupts said-circuit byfian insulated section'j a W I I The-invention is. also applicable to other types of elevators than electric; For instance, I haveshown in Fi'g. 2 its application to thevalv-ewheel N such as shown in Patent Now 981',4:4:2-gr5l nted January 10,- 1911", to =Robert P. .Lumley and Henry Hillman. In this embodiment of the inven-v tion M is;the lockingarm for the v'a'lve Wheel, 'B the electromagnen'b the movable core-c the rod insulated by c lto operate the leaf spring bridging; contact 0 and 0.

the-terminals ofcircu'it 2; B iis a' spring to hold core 6 in its: forward position to release the valve wheel except when electromagnet Bei s'aenergized. The operation :of this a1;- rangement is otherwise the same as that de scribed in cvonnectioni Vith FlgL' 1.-

It: alt; obvious that many changes: in: con struction and arrangement of parts maybe made without" departing from the invention as set forth in the appended claims.- For instance,- circ'uit 3 may be normally closed instead of open, when the action of the elec-= tromagnet Will be reversed. In the term door, I include? the-'col1=apsib1e gatezon door upon the car; to 5Whi0h the invention may be applied, as well as the floorgdoQr. Referring tohFig. 3, in this connection, a collapsible :gate (r on the can Bis-'1 shown :in; its closed on extended position. It, will be eb served that the gatehas engaged theendot the curved lower portion ioiiwtjhe contact; lever w:- throwing the, ,same out engagement with! contact a? and thus openingecir-z wit :3 he switch andziflash-ilight may? be operated so tha -diglatvwilltshow when the; collapsi e 'g t on the elevateraean is;

dent

lap sible gate is closed or partlyclosed, Also,

conditions being the same for the purpose of my invention. i l laying described my invention, what uaiie'asnew, and desire to secure'by L'etterscfiatent oii the, United States is 1. An elevator safety system comprising, in combination with an elevator car and a door; .anormal operating means: for saidcar,

a device distinct fromsaid normal operating; Iheans' an'd v operated 1 independently thereoff tor determining the application of power-to said car, anelectromagnet arranged to con-- trol said device,- a safety circuit including said electromagnet and a switch operated by said-door, an indicating device in the car,-and a circuit extending from said indicating device and operated by said electromagnet, whereby the operator is notified at any time said door is in a dangerous posi- 131011. f r e 2' An elevator safety system comprising, incombination ;With;an elevator car-and a dof'or,:a normalzcontrolj circuit andswit'chfor controlling the application of power tosaid car, contacts in said? control circuit inde pendent ofts'aidpswitch, anelectro-m'agnet arranged ,to: operate said contacts, a safetyci-rcuit Eincluding said :ele ctrb+'magnet; and a switch operated ,"by said =door,';- any indicating; device insaid car, and a circuit including saidiindicating device and a switch operated byisaid-electrdmagnet.

8; An elevator safety system comprising,- in combination withan-elevator car and'ja door, a. normal control circuit and switch; for controlling the-application of tpowerto said car, aniindependent switch in saidn'or-i mal control circuit; an eleoti g jn net 913 operat ng -.sa .d switches safe eluding Sa d; e1ect 1magnetan operatedbiysaid-doon an indic'a M r inf-the e r, nd cimuit i alu. t ng aideating device and a switch" operated by electremagj et- 5:. :3 -.5 .1 n

- i sti e ywhereof vehe u to .set my hand in presence of two subscribing wit; nesses. Y z 

